CUPCAKES:,Heat oven to 350. Line 24 cups in muffin trays.,In large bowl, stir together butter, sugars and eggs until well blended.,______,Spoon 1/4 c batter into each cupcake liner.,Bake at 350 for 25-27 minutes or until toothpick inserted in center comes out clean.,Cool cupcakes in pan on rack for 5 minutes, then remove and cool completely on wire rack.,FROSTING:,In a large bowl, beat butter and confectioners' sugar together on medium-high until blended.,Add cream cheese and vanilla and beat on medium-high until no lumps remain.,Divide frosting among cupcakes.